gps_bricklet

package
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 Go to latest Published: Feb 27, 2024 License: CC0-1.0 Imports: 5 Imported by: 0

Documentation

Overview

Determine position, velocity and altitude using GPS‍.

See also the documentation here: https://www.tinkerforge.com/en/doc/Software/Bricklets/GPS_Bricklet_Go.html.

Index

Constants

View Source 
const DeviceDisplayName = "GPS Bricklet"
View Source 
const DeviceIdentifier = 222

Variables

This section is empty.

Functions

This section is empty.

Types

type Fix 

type Fix = uint8
const (
	FixNoFix Fix = 1
	Fix2DFix Fix = 2
	Fix3DFix Fix = 3
)

type Function 

type Function = uint8
const (
	FunctionGetCoordinates               Function = 1
	FunctionGetStatus                    Function = 2
	FunctionGetAltitude                  Function = 3
	FunctionGetMotion                    Function = 4
	FunctionGetDateTime                  Function = 5
	FunctionRestart                      Function = 6
	FunctionSetCoordinatesCallbackPeriod Function = 7
	FunctionGetCoordinatesCallbackPeriod Function = 8
	FunctionSetStatusCallbackPeriod      Function = 9
	FunctionGetStatusCallbackPeriod      Function = 10
	FunctionSetAltitudeCallbackPeriod    Function = 11
	FunctionGetAltitudeCallbackPeriod    Function = 12
	FunctionSetMotionCallbackPeriod      Function = 13
	FunctionGetMotionCallbackPeriod      Function = 14
	FunctionSetDateTimeCallbackPeriod    Function = 15
	FunctionGetDateTimeCallbackPeriod    Function = 16
	FunctionGetIdentity                  Function = 255
	FunctionCallbackCoordinates          Function = 17
	FunctionCallbackStatus               Function = 18
	FunctionCallbackAltitude             Function = 19
	FunctionCallbackMotion               Function = 20
	FunctionCallbackDateTime             Function = 21
)

type GPSBricklet 

type GPSBricklet struct {
	// contains filtered or unexported fields
}

func New 

func New(uid string, ipcon *ipconnection.IPConnection) (GPSBricklet, error)

Creates an object with the unique device ID `uid`. This object can then be used after the IP Connection `ipcon` is connected.

func (*GPSBricklet) DeregisterAltitudeCallback 

func (device *GPSBricklet) DeregisterAltitudeCallback(registrationId uint64)

Remove a registered Altitude callback.

func (*GPSBricklet) DeregisterCoordinatesCallback 

func (device *GPSBricklet) DeregisterCoordinatesCallback(registrationId uint64)

Remove a registered Coordinates callback.

func (*GPSBricklet) DeregisterDateTimeCallback 

func (device *GPSBricklet) DeregisterDateTimeCallback(registrationId uint64)

Remove a registered Date Time callback.

func (*GPSBricklet) DeregisterMotionCallback 

func (device *GPSBricklet) DeregisterMotionCallback(registrationId uint64)

Remove a registered Motion callback.

func (*GPSBricklet) DeregisterStatusCallback 

func (device *GPSBricklet) DeregisterStatusCallback(registrationId uint64)

Remove a registered Status callback.

func (*GPSBricklet) GetAPIVersion 

func (device *GPSBricklet) GetAPIVersion() [3]uint8

Returns the version of the API definition (major, minor, revision) implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

func (*GPSBricklet) GetAltitude 

func (device *GPSBricklet) GetAltitude() (altitude int32, geoidalSeparation int32, err error)

Returns the current altitude and corresponding geoidal separation.

This data is only valid if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) GetAltitudeCallbackPeriod 

func (device *GPSBricklet) GetAltitudeCallbackPeriod() (period uint32, err error)

Returns the period as set by SetAltitudeCallbackPeriod.

func (*GPSBricklet) GetCoordinates 

func (device *GPSBricklet) GetCoordinates() (latitude uint32, ns rune, longitude uint32, ew rune, pdop uint16, hdop uint16, vdop uint16, epe uint16, err error)

Returns the GPS coordinates. Latitude and longitude are given in the https://en.wikipedia.org/wiki/Dilution_of_precision_(GPS) for more information.

EPE is the Estimated Position Error. This is not the absolute maximum error, it is the error with a specific confidence. See https://www.nps.gov/gis/gps/WhatisEPE.html for more information.

This data is only valid if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) GetCoordinatesCallbackPeriod 

func (device *GPSBricklet) GetCoordinatesCallbackPeriod() (period uint32, err error)

Returns the period as set by SetCoordinatesCallbackPeriod.

func (*GPSBricklet) GetDateTime 

func (device *GPSBricklet) GetDateTime() (date uint32, time uint32, err error)

Returns the current date and time. The date is given in the format “ddmmyy“ and the time is given in the format “hhmmss.sss“. For example, 140713 means 14.07.13 as date and 195923568 means 19:59:23.568 as time.

func (*GPSBricklet) GetDateTimeCallbackPeriod 

func (device *GPSBricklet) GetDateTimeCallbackPeriod() (period uint32, err error)

Returns the period as set by SetDateTimeCallbackPeriod.

func (*GPSBricklet) GetIdentity 

func (device *GPSBricklet) GetIdentity() (uid string, connectedUid string, position rune, hardwareVersion [3]uint8, firmwareVersion [3]uint8, deviceIdentifier uint16, err error)

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an `Isolator Bricklet <isolator_bricklet>` is always at position 'z'.

The device identifier numbers can be found `here <device_identifier>`. |device_identifier_constant|

func (*GPSBricklet) GetMotion 

func (device *GPSBricklet) GetMotion() (course uint32, speed uint32, err error)

Returns the current course and speed. A course of 0° means the Bricklet is traveling north bound and 90° means it is traveling east bound.

Please note that this only returns useful values if an actual movement is present.

This data is only valid if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) GetMotionCallbackPeriod 

func (device *GPSBricklet) GetMotionCallbackPeriod() (period uint32, err error)

Returns the period as set by SetMotionCallbackPeriod.

func (*GPSBricklet) GetResponseExpected 

func (device *GPSBricklet) GetResponseExpected(functionID Function) (bool, error)

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by SetResponseExpected. For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

See SetResponseExpected for the list of function ID constants available for this function.

func (*GPSBricklet) GetStatus 

func (device *GPSBricklet) GetStatus() (fix Fix, satellitesView uint8, satellitesUsed uint8, err error)

Returns the current fix status, the number of satellites that are in view and the number of satellites that are currently used.

Possible fix status values can be: 

Value| Description
--- | ---
1| No Fix| GetCoordinates| GetAltitude and GetMotion return invalid data
2| 2D Fix| only GetCoordinates and GetMotion return valid data
3| 3D Fix| GetCoordinates| GetAltitude and GetMotion return valid data

There is also a `blue LED <gps_bricklet_fix_led>` on the Bricklet that indicates the fix status.

Associated constants:

  • FixNoFix
  • Fix2DFix
  • Fix3DFix

func (*GPSBricklet) GetStatusCallbackPeriod 

func (device *GPSBricklet) GetStatusCallbackPeriod() (period uint32, err error)

Returns the period as set by SetStatusCallbackPeriod.

func (*GPSBricklet) RegisterAltitudeCallback 

func (device *GPSBricklet) RegisterAltitudeCallback(fn func(int32, int32)) uint64

This callback is triggered periodically with the period that is set by SetAltitudeCallbackPeriod. The parameters are the same as for GetAltitude.

The RegisterAltitudeCallback callback is only triggered if the altitude changed since the last triggering and if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) RegisterCoordinatesCallback 

func (device *GPSBricklet) RegisterCoordinatesCallback(fn func(uint32, rune, uint32, rune, uint16, uint16, uint16, uint16)) uint64

This callback is triggered periodically with the period that is set by SetCoordinatesCallbackPeriod. The parameters are the same as for GetCoordinates.

The RegisterCoordinatesCallback callback is only triggered if the coordinates changed since the last triggering and if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) RegisterDateTimeCallback 

func (device *GPSBricklet) RegisterDateTimeCallback(fn func(uint32, uint32)) uint64

This callback is triggered periodically with the period that is set by SetDateTimeCallbackPeriod. The parameters are the same as for GetDateTime.

The RegisterDateTimeCallback callback is only triggered if the date or time changed since the last triggering.

func (*GPSBricklet) RegisterMotionCallback 

func (device *GPSBricklet) RegisterMotionCallback(fn func(uint32, uint32)) uint64

This callback is triggered periodically with the period that is set by SetMotionCallbackPeriod. The parameters are the same as for GetMotion.

The RegisterMotionCallback callback is only triggered if the motion changed since the last triggering and if there is currently a fix as indicated by GetStatus.

func (*GPSBricklet) RegisterStatusCallback 

func (device *GPSBricklet) RegisterStatusCallback(fn func(Fix, uint8, uint8)) uint64

This callback is triggered periodically with the period that is set by SetStatusCallbackPeriod. The parameters are the same as for GetStatus.

The RegisterStatusCallback callback is only triggered if the status changed since the last triggering.

func (*GPSBricklet) Restart 

func (device *GPSBricklet) Restart(restartType RestartType) (err error)

Restarts the GPS Bricklet, the following restart types are available: 

Value| Description
--- | ---
0| Hot start (use all available data in the NV store)
1| Warm start (don't use ephemeris at restart)
2| Cold start (don't use time| position| almanacs and ephemeris at restart)
3| Factory reset (clear all system/user configurations at restart)

Associated constants:

  • RestartTypeHotStart
  • RestartTypeWarmStart
  • RestartTypeColdStart
  • RestartTypeFactoryReset

func (*GPSBricklet) SetAltitudeCallbackPeriod 

func (device *GPSBricklet) SetAltitudeCallbackPeriod(period uint32) (err error)

Sets the period with which the RegisterAltitudeCallback callback is triggered periodically. A value of 0 turns the callback off.

The RegisterAltitudeCallback callback is only triggered if the altitude changed since the last triggering.

func (*GPSBricklet) SetCoordinatesCallbackPeriod 

func (device *GPSBricklet) SetCoordinatesCallbackPeriod(period uint32) (err error)

Sets the period with which the RegisterCoordinatesCallback callback is triggered periodically. A value of 0 turns the callback off.

The RegisterCoordinatesCallback callback is only triggered if the coordinates changed since the last triggering.

func (*GPSBricklet) SetDateTimeCallbackPeriod 

func (device *GPSBricklet) SetDateTimeCallbackPeriod(period uint32) (err error)

Sets the period with which the RegisterDateTimeCallback callback is triggered periodically. A value of 0 turns the callback off.

The RegisterDateTimeCallback callback is only triggered if the date or time changed since the last triggering.

func (*GPSBricklet) SetMotionCallbackPeriod 

func (device *GPSBricklet) SetMotionCallbackPeriod(period uint32) (err error)

Sets the period with which the RegisterMotionCallback callback is triggered periodically. A value of 0 turns the callback off.

The RegisterMotionCallback callback is only triggered if the motion changed since the last triggering.

func (*GPSBricklet) SetResponseExpected 

func (device *GPSBricklet) SetResponseExpected(functionID Function, responseExpected bool) error

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

func (*GPSBricklet) SetResponseExpectedAll 

func (device *GPSBricklet) SetResponseExpectedAll(responseExpected bool)

Changes the response expected flag for all setter and callback configuration functions of this device at once.

func (*GPSBricklet) SetStatusCallbackPeriod 

func (device *GPSBricklet) SetStatusCallbackPeriod(period uint32) (err error)

Sets the period with which the RegisterStatusCallback callback is triggered periodically. A value of 0 turns the callback off.

The RegisterStatusCallback callback is only triggered if the status changed since the last triggering.

type RestartType 

type RestartType = uint8
const (
	RestartTypeHotStart     RestartType = 0
	RestartTypeWarmStart    RestartType = 1
	RestartTypeColdStart    RestartType = 2
	RestartTypeFactoryReset RestartType = 3
)

Source Files

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